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Articles 1 - 4 of 4
Full-Text Articles in Inorganic Chemistry
Cyclization Of Peptide Structures By Creating Metal Foldamers Using 99m-Tc/Re(Co)3, Dhvani D. Oza
Cyclization Of Peptide Structures By Creating Metal Foldamers Using 99m-Tc/Re(Co)3, Dhvani D. Oza
Electronic Thesis and Dissertation Repository
Constrained peptides have been successful as therapeutics owing to the rigidity in their framework, allowing them to have enhanced pharmacological properties. Apart from covalent bond based cyclization, constraints can be induced by cyclization using metal coordination. The metals Re and 99mTc are one of the few metals which have not been studied in great detail for their ability to cyclize linear peptides. A tri-alanine sequence was employed in the peptide backbone due to its ability to form stable helices. In addition, another tripeptide sequence RGD, which is recognized by the integrin avb3, was also used. …
Electronic And Local Structures Of Pt-Based Bimetallic Alloy And Core-Shell Systems, Jiatang Chen
Electronic And Local Structures Of Pt-Based Bimetallic Alloy And Core-Shell Systems, Jiatang Chen
Electronic Thesis and Dissertation Repository
This thesis investigates the electronic structure of Pt for catalysis applications. The importance of the Pt 5d band is discussed in terms of the bonding capability of Pt. The oxygen reduction reaction in proton exchange membrane fuel cells is chosen as the catalytic reaction model to illustrate the effect of Pt 5d states on Pt-O interaction. Pt-based bimetallic systems are introduced as a solution for the high price and limited resources of Pt. Despite lower usage of Pt, the tuning capability to optimize the Pt 5d band in bimetallic catalysts is supposed to provide superior catalytic activity. Advanced synchrotron X-ray …
Iron(Ii) Metal-Ligand Cooperative Catalysts For Endo-Selective Intramolecular Hydrofunctionalization, Benjamin Bridge
Iron(Ii) Metal-Ligand Cooperative Catalysts For Endo-Selective Intramolecular Hydrofunctionalization, Benjamin Bridge
Electronic Thesis and Dissertation Repository
Two new cationic Fe(II) PR2NR'2 complexes, [Fe(Cp*)(PR2NPh2)(MeCN)]PF6 (R = cyclohexyl, 3a) and [Fe(Cp*)(PR2NPh2)(MeCN)]PF6 (R = phenyl, 3b), were synthesized and characterized. The catalytic activity for intramolecular hydrofunctionalization was tested using the benchmark substrate 2-ethynylaniline (EA) and both catalysts effectively produced indole (Ind). The selectivity of catalysis was also tested using 2-ethynylbenzyl alcohol (EBA) and both catalysts formed only the endo product isochromene (IC). These complexes represent the first well-defined Fe(II) catalysts that …
N-Heterocyclic Carbene Ligated Group 11 Trimethylsilylchalcogenolates: Building Blocks For Heterometallic Chalcogenide Molecules, Dickron Richard Nahhas
N-Heterocyclic Carbene Ligated Group 11 Trimethylsilylchalcogenolates: Building Blocks For Heterometallic Chalcogenide Molecules, Dickron Richard Nahhas
Electronic Thesis and Dissertation Repository
The synthesis of heterometallic chalcogenide molecules requires the continued investigation into the appropriate reagents necessary to introduce metal – chalcogen bonds in a controlled fashion. Trimethylsilyl metallochalcogenolates (MESiMe3) act as synthons introducing “ME–“ in solution upon reacting with an appropriate ternary metal reagent, MX (X= halide, acetate, etc.). Recent work makes use of N–heterocyclic carbenes (NHCs) as a class of ancillary ligand that can stabilize these reagents and the heterometallic chalcogenide molecules obtained with them. Building on previous work, this thesis describes the synthesis of group 11 trimethylsilyl metallochalcogenolates stabilized by bis–1,3–tritylimidazole–2–ylidene (abbreviated ITr) …